Sight for firearms.



W. STRUBEL.

SIGHT FOR FIREARMS.

APPLICATION FILED MAY19,1915.

1 ,1 84,395. Patented May 23, 1916.

[3km 28 F1' I* 3 10 ATTORNEYS WILLIAM STRUBEL, OF PHILADELPHIA,PENNSYLVANIA.

SIGHT FOR FIREARMS.

Specification of Letters Patent.

Patented May 23, 1916.

Application filed May 19, 1915. Serial N o. 29,071.

To all whom t may concern:

Be it known that I, WILLIAM STRUBEL, of Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented certain new anduseful Improvements in Sights for Firearms; and I do hereby declare thatthe following is a full, clear, and exact description thereof, ,whichwill enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, and tothe reference-numerals marked thereon, which form part of thisspecification.

My present invention relates to sights for iire arms and moreparticularly to the rear sights for rifles.

The purpose of my present invention is to provide a fire arm sight ofimproved construction and one that is'readily and accurately adjustableto different ranges and at the same time is compact and not liable to bedisarranged or injured by contact with other things.

A further purpose of my invention is to provide an adjustable sighthaving a plate member tensioned to bear toward the barrel and havingsaid plate member provided on its lower surface with an incline or witha series of steps or notches with which a sliding member interposedbetween the barrel and said plate will engage and raise the plate tovarying heights as the slide is adjusted.

A further purpose in a sight such as described is to have the slideextend beyond the sides of the plate and afford gripping surfaces forthe convenient and positive movement of said slide.

A still further purpose of my invention is to provide a qualifying orcorrecting adjustment in connection with the main adjustment fordifferent ranges and particularly to provide an adjustable sightcomposed of a yielding plate and a slide therebelow for the mainadjustment to different ranges with a secondary or qualifying orcorrecting adjustment. My purpose is to have such qualifying adjustmentof such construction and operation that it may be readily operated whenthe main adjustment is at any given range and such secondary adjustmentwill be carried forward or backward with a similar correcting effect toany other step or position of the main adjustment without furtheroperation or attention.

Further purposes and advantages of my invention will appear from thespecification and claims herein.

Figure 1 is a plan view of a sight embodying my invention as applied toa section of a rifle barrel. Fig. 2 is a side view of said sight. Fig. 3is a plan View of the plate as viewed from beneath. Fig. 4 is a sideview of the same member. Fig. 5 is a cross seetional view on an enlargedscale on line 5 5 of Fig. 2. Fig. 6 is a top view on an enlarged scaleof the slide and the bridge mounted thereon. Fig. 7 is a side View ofthe slide and Fig. S is an end View thereof on a similar scale. Also onan enlarged scale Fig. 9 is atop or plan view of the bridge and Fig. 10a side view of the same member. Figs. 11 and 12 are plan and end viewsrespectively on an enlarged scale of a slide having the bearing edges onan integral or fixed part thereof instead of upon a movable bridge. Fig.13 is a side view of the plate 15 having the downturned side flangesslanting downwardly as they extend toward the rear.

Referring to the drawings in a more particular description: the sight issecured to the barrel 14 by the plate 15 having one end, preferably itsforward end, securely xed to the barrel in any desired way as by a screw24 holding the plate to a key 16 fitting into an undercut recess 17provided in the top of the barrel 14 and extending transversely thereof.The plate 15 extends lengthwise of said barrel and has its free endslightly spaced from the top of the barrel 14 and tensioned to beartoward said barrel through said plate being of slightly resilientmaterial. Preferably the free end will extend toward the rear of thebarrel in order to get the sight piece 18 which is at the extreme end ofthe free part of the plate as far toward the rear of the barrel aspossible, although it is obvious that the free end of the sight may beforward of the fastened end of the plate without losing the structuraladvantages of my invention.

From about midway of the plate 15 toward its free end, the plate isprovided with downturned flanges 2O at its sides, the lower edge 2l ofsaid flanges being at an incline @Larra-tiental relative to the axis ofthe barrel 14 and slanting upward from the barrel as the flanges extendto the rear. f Said inclined edges 21 are composed of a series ofnotches 22 with intervening and preferably rounded steps 23 leading fromnotch to notch.

Just forward of the side flanges 20 the plate l5 is provided with anupwardly extending offset 25 whereby the plate 15 to the rear of saidoffset extends parallel with the top of the barrel but at some distancetherefrom providing room for the downturned flanges 20. A short distancebeyond the rearward step 23 the plate 15 is turned down in a loop 26toward the top of the barrel and then turned upward forming the sightpiece 18 at the extreme end of the plate, said sight piece beingprovided with a sight notch or other device 27.

Interposed between the raised portion toward the free end of the plate15 with its downturned and inclined side flanges 20 and the barrel 14 isthe sliding member or slide 28, preferably having its bottom curved orshaped to substantially fit the usual curve or other shape of the barrel14. v

The slide extends at each side beneath the inclined flanges 2O upon theplate 15, and outside of said flanges the slide is extended upwardlyadjacent to the outer surface of said flanges thus preventing sidewisedisplacement of the slide. The sides of the slide beyond the flanges 20are also preferably extended both forwardly and rearwardly, as indicatedparticularly in Figs. 1, 6 and 7. This extension lengthwise of the sidesgives a long base to the slide preventing any tendency to tip or rollover when the slide is moved longitudinally of the barrel. The upwardand longitudinal extension of the outwardly projecting sides 31 and 32of the slide 28 also affords a more extensive surface to be graspedbetween the thumb and finger for the movement of the slide. The exteriorsurfaces of said sides 31 and 32 are knurled or otherwise roughened toafford a convenient gripping surface for said purpose.

In the top of the slide member or slide 28 is mounted a bridge 33extending across the slide 28 and beneath the oppositely disposedinclined fianges 20 upon the plate 15. The bridge 33 is mounted in agroove 34 in the slide 28 so that the said bridge is carriedlongitudinally of the barrel when and as the slide 28 is moved in eitherdirection along the barrel. Movement of the bridge 33 longitudinally ofits containing groove is prevented by the said bridge being providedwith enlargements 35 at either side fitting into correspondingly shapedrecesses 36 in the central part of the slide 28. The bridge is adapted,however, to be moved up and down relative to said slide and in its Saidcontaining groove. As means for Areadily and accurately adjusting theelevation of the bridge relative to the slide, there is verticallymounted in the central portion of the bridge 33 and in screw-threadedengagement therewith, a set-screw 37 of a length substantially the depthof said bridge.- Upon the proper tool being applied to the top of saidscrew 37, the screw may be turned down in said bridge thereby in anobvious manner raising the bridge relative to the slide, it beingunderstood that the lower end of the said set-screw 37 bears against thebottom of the groove 34 in said slide.

Toward either end of the bridge 33 and beneath the inclined and notchedflanges 20, bearing points 38 are provided upon the said bridge toengage the said notched fianges 210 and to raise the plate 15 thereby asthe slide is moved longitudinally of the barrel. Preferably the saidbearing points 28 are formed by the bridge 33 being provided with twopairs of oppositely disposed slanting faces 39 and 40 slanting upwardtoward each otherl to form the bearing edge or point 38. The slantingfaces at both sides of said bearing edges coperating with the slantingor rounding steps 23 between the notches 22 in the downturned flanges20, operate by a camming action to raise the resilient plate 15 as theslide is forced back and forth upon the barrel. The coperating slantingsides and the tendency of the plate 15 to bear strongly toward thebarrel enables the operator to readily stop the slide at the desirednotch in either forward or backward movement of the slide upon thebarrel.

The slide 28 and its bridge 33 may be readily assembled upon the 'barrelafter the plate 15 is secured in place by temporarily lifting the freeend of said plate enough to allow the slide and the bridge mountedtherein to be moved longitudinally of the barrel beneath the downwardlyextending loop 26 near the free end of the plate 15. When needed' theslide and its bridge may be removed by similarly raising the free end ofthe plate 15. When the slide and the bridge are in place beneath theplate 15, the pressure of the plate holds the slide and bridge firmlytogether and in place while at the same time admitting longitudinalmovement of the slide upon the barrel. The downturned loop 26 preventsthe slide being moved from beneath the plate by ordinary movement of theslide.

It will now be obvious that assuming the y sight piece 18 at the extremeend of the plate. A convenient arrangement of the parts is to have therearmost position of the slide raise the sight piece to proper positionfor the nearest range desired, say one hundred yards, and to have theparts so proportioned that successive advancements of the slide wouldraise the sight to successive further ranges such as two hundred yards,three hundred yards, four hundred yards, and so on. Withdrawing theslidev from forward position would allow the sight to be loweredproportionately through the tension of the plate 15 by`lowering thesight piece as far as the slide and the bridge would allow.

Assuming that the main adjustment either at first position or at anysubsequent position is found by test to be incorrect, the secondary orqualifying adjustment is brought into play by turning down the set-screw87, slightly, thus raising the bridge and thereby the sight piece 18without movement of the slide 28 until by test the complete sight iscorrect for the range being tested. Ordinarily such testing for accuracywill be made with the slide at the rearmost position. After thequalifying adjustment at given range has been made, movement of theslide carries a proportionate correction to other points of the mainrange adjustment without further operation of the secondary adjustment.In this way the slide may be moved forward or backward to procure thevdesired different ranges without destroying or affecting the correctingadjustment that has been once obtained. It will be understood, ofcourse, that the notches 22 are accurately positioned and placed toobtain the desired difference in elevation of the sight piece 18 toobtain the correct ranges of the fire arm at the different distancesdesired.

Figs. 11 and 12 are plan and end views respectively of a modified formof my invention as far as relat\es to the main adjustment. rl`hemodification consists in making the bearing edges 42 upon an integral orfixed part of the slide 28 instead of upon a bridge movable in relationto said plate. It will be seen that this modification obtains theadvantages of my construction and invention in so far as the mainadjustment is concerned but does not admit of the secondary orqualifying adjustment hereinbefore described.

The modification shown in Fig. 13 consists in having the inclinedflanges upon the plate 15 slope toward the barrel as the rear end of theplate is approached rather than the reverse as shown in Fig. 4. It willbe obvious that this modification will result in the sight being raisedas the slide is moved rearwardly and lowered as the slide is movedforwardly. Access to the top of the set-screw 37 for the purpose ofregulating the secondary or qualifying sight is at all times afforded bya central longitudinally extending slot 41 being provided in the portionof the plate 15 that is raised or between the downturned fiange 20. Forthe sake of compactnessl and convenience the central part of the slide28 projects somewhat into this slot 41 and it is in this upwardlyprojecting'part of the slide that the central portion of the bridge withits adjustable screw 37 is housed.

What I claim as new and desire to secure by Letters Patent is:

1. The combination in a fire-arm sight of a lire-arm barrel, a plateextending longitudinally of the barrel and having one end securedthereto and the other end spaced from and yieldingly tensioned to beartoward the barrel and provided therebeneath with a surface inclinedrelative to the axis of the barrel, a member slidingly interposedbetween the said incline and the barrel and adapted to move the free endof the plate to different heights by movement to different portions ofsaid incline, means on the plate for holding said sliding member indesired position relative to said incline, a sight piece on the free endof said plate and a bridge interposed between said slide and saidinclined surface on the plate and adjustably mounted in said slide toraise said plate from said slide.

2. The combination in a lire-arm sight of a fire-arm barrel, a plateextending longitudinally of the barrel and having one end securedthereto and the other end spaced from and yieldingly tensioned to beartoward the barrel and provided therebeneath with a surface inclinedrelative to the axis of the barrel, a member slidingly interposedbetween the said incline and the barrel and adapted to move the free endof the plate to different heights by movement to different positionsupon said incline, means on the plate for holding said slide in desiredposition relative to said incline, a sight piece on the free end of saidplate and an adjustable member operatively connected to said slide andadapted to vary the combined height of said member and said slide,whereby said plate is further raised or lowered.

3. The combination in a fire-arm sight of a lire-arm barrel, a plateextending longitudinally of the barrel and having one end securedthereto and the other end spaced from and yieldingly tensioned to beartoward the barrel and provided therebeneath with a surface inclinedrelative to the axis of the barrel, a member' slidingly interposedbetween the said incline and the barrel and adapted to move the free endof the plate to different heights by movement to different portions ofsaid incline, means on the plate for holding said sliding member in Inwitness whereof I have affixed my sigdesired position relative to saidincline, a, sight piece on the free end of said plate and a bridgemounted with screw adjustment in the top of said slide and engaging saidincline whereby said plate is raised or lowered relative to said slide.

11th day of May 1915.

WILLIAM STRUBEL. Witnesses:

HARRISON Ur. CAssEL,

CHARLES EBERLE.

five cents each, by addressing the Commissioner otl'atentl,

Copies of this patent may be obtained for Washington, D. 0.

nature, in the presence of two witnesses, this

